var repeatedSubstringPattern = function (s) {
    if (s.length === 0)
        return false;

    const getNext = (s) => {
        let next = [];
        let j = -1;

        next.push(j);

        for (let i = 1; i < s.length; ++i) {
            while (j >= 0 && s[i] !== s[j + 1])
                j = next[j];
            if (s[i] === s[j + 1])
                j++;
            next.push(j);
        }

        return next;
    }

    let next = getNext(s);

    if (next[next.length - 1] !== -1 && s.length % (s.length - (next[next.length - 1] + 1)) === 0)
        return true;
    return false;
};